backup generator

基本解释

It would serve as a backup generator "in case Alcatraz is compromised, " he said.
它作为“一个后备发电机”，以防止恶魔岛妥协。
At the onset of the earthquake, the plant automatically shut down the fission process, which normally would leave the coolant system--both the main one and a backup generator--still operational.
地震发生时，核电站已经自动中止裂变反应过程，一般只剩下冷却系统――主发电机和备用发电机――仍处于运行状态。
That is, backup diesel generator set 100KW common power 90KW.
也就是备用100KW的柴油发电机组的常用功率为90KW。
fdjz8.cn

An emergency backup generator is only allowed to operate for 200 hours every year and only in the event of an emergency power failure or for routine testing and maintenance.
FORBES: Backup Generators Are the Bad and Ugly of Decentralized Energy
Neither solar nor wind are powerful enough to carry the heavy load that a backup generator must provide to a facility such as a hospital or a school or a county prison.
FORBES: Peak Oil and ERoEI: Still Nonsense